Tube vulcanizer



April 29, 1930. A, FL ITER ET AL 1,756,058

TUBE VULCANI ZER Original Filed Feb. 24, 1927 2 Sheets-Sheet l ATTORNEY.)

April 29, 1930.

A. J. FLEITER ET AL TUBE VULGANIZER Original Filed Feb. 24, 1927 2Sheets-Sheet 2 BY I5 4 ZZW gW A TTORNEYJ.

Patented Apr. 29, 1930.

UNITED STATES AT NT OFFICE ANDREW J. FLEITER. OF AKRON, HENRY C.BOSTWICK, OF KENMORE, AND THEODORE A. MILLER, OF AKRON, OHIO, ASSIGNORSTO THE A KRON STANDARD MOLD COM- PANY, OF AKRON, OHIO, A CORPORATION OFOHIO TUBE V'ULCANIZER Original application filed February 24, 1927,Serial No. 170,511. Divided and this application filed July 1,

- 1927. Serial No. 202,843.

This invention .relates to new and useful improvements in vulcanizers,particularly'of the type known as watchcase vulcanizers which arecharacterized by the fact that each I vulcanizer comprises a central orstationary member on opposite sides of wh1ch are formed 1 cavities forthe vulcanization of tires, tubes, or the like, the cavities beingclosed by swinging or movable members which are brought into contactwith the stationary member and locked in position.- The invention isillustrated for use in the vulcanization of inner tubes, and is directedparticularly to the means employed for accommodating the valve stem ofthe tube and tightly closing the orifice about the valve stem-so as toreduce the loss occurring at this point. The invention may be utilizedin vulcanizers having a single swinging or movable section or halves, aswell as in'the doublecavity type illustrated herein. 7

This ap lication is a division of prior application erial No. 170,511,filed February 24, 1927.

It will be understood that the detailed description given herein is forthe purpose of explaining the invention to those skilled in l the artand is not for the purpose of limitation tothe scope thereof, except asrequired by the prior art and as set forth in the claims heretoappended. 7

In the drawings which accompany this aplication is shown one form of theinvention, m which Figure 1 is aggeneral side view of a watchcasevulcanizer having the improvements incorporated therein;

Figure 2 is an enlarged detail ofthe mold at the valve stem Figure 3 isa section on the line 33 of Figure and Figure 4 is a view looking frombelow at the mechanism shown in Figure 2.

The watchcase vulcanizer is mounted upon a standard or base 10, to theupper surface of which is secured the central or stationary member 11.The'outer faces of these castings are formed with cavities 15,one'of'which is illustrated in Fi ure 3, each of which'constitutes oneside 0 the vulcanizing chamber is the cavity 20, which, with the cavity15,

completes the molding space. The sections are provided with steamcavities by which they are heated to vulcanize the tube.

When the pair of mold sections is placed together, the-sections areclamped in position by means of a rotary locking ring 22 on thestationary member '11, which engages the swinging section to lock themold for the vulcanizing, operation, .being actuated by a piston 24moved by a cylinder 25, pivotally mounted at the base of the machine.when the pressure fluid-is admitted. to the cylinder, as stated, theclamping ring is rotated in either direction, depending upon whether themoldis to be locked or opened.

The vulcanizer is designed forthe purpose of curing tubes, it beingdesirable to provide for the accommodation of tubes of difi'ernt sizesor. shapes in a single vulcanizer. For

this purpose, the section 11 is provided with a recess or chamber 30 atone point about its periphery andto the wall of'the' section isreplaceably secured a. plate 31 which is formed on its face with-a.semi-c'ircular channel orpassageway 32 for the valve stem V Thelowerend of the plate 31 is .enlarged some-f the plate may be changed asrequired. The

lower portion of the mold is cut away upon a generally V-shaped cut soas to obtain access to the tube, as shown at 34, and the space thus leftopen is closed by a correspondingly tongue 38 shaped block 35 secured tothe movable vulcanizer section 16. The inner edge of the I block 35 hassecured to it a replaceable plate 36, which is provided with acomplementary channel or passageway 37 which, with the passageway 32,encloses the valve stem. The lower end of the plate which enters therecess in the lower. portion of the plate 31 formed by exten- 6 sions 40at the'base of the plate 31.

It will be observed that the description of the inventiomhas been setout with considerable detail, but changes and modifications may be madetherein without departing from the scope of the invention as set forthin the claims.

What is claimed is:

1. In a vulcanizer for tubes, the combination of separable mold sectionsthe sections parting about the inner circumference of the tube abouta'line to one side of the valve stem, a recess in one of the sections, aremovable plate secured in the recess, partially filling the same andhaving a channel for the receptionof one side. of the valve stem, ablock se- I cured to the other-section fitting therecess,

and a second removable plate secured to the block having a channeltherein for the reception of the other-side'of the valve stem.

2. In a vulcanizer for tubes, the combination of separable moldsections, the sections parting about the inner circumference of the tubeabout aline to one 'side of the valve stem, a recess in one of thesections, a removable plate secured'in the recess, partially filling thesame and having a channel for the reception of one side of thevalvestem, a block secured to the other section fitting the recess, and asecond removable plate secured to the block havin a channel therein forthe reception of the ot er side of the valve stem, the plateshavinginterengaging pro ections and recesses.

. 3. In a vulcamzer, a'statlonary section and a movable section hingedthereto, the said sectionshaving mating cavities for the vulcanizationof an inner tube, the sections parting about the inner circumference ofthe tube on a line outwardly of the valve stem, the

stationar section havm a recess with outwardly aring side wal s, awedge-shaped projection on the movable section adapted to enter the saidrecess, and removable plates on said projection and in said recess toclose the inner surface of the'cavity about the valve stemwhereby'difierentsized valve stems can be accommodated. a

- ANDREW J. FLEITER.

HENRY C. BOSTWICK.

THEODORE A. MILLER.

36 is provided with a

